I love the feeling of the doctor pulling the foreskin back to expose the head. It hasn't happened often. The last time was when a camera was put in my bladder. Not erotic at all, completely flaccid.
A while ago someone (not on here) asked to see pictures of my penis with foreskin in normal position and also pulled back. So difficult to do while holding the camera at the right angle. Because of the fiddling about I lost whatever little erection I had.